Crash on:
Fulgora science equal 1000/m
yellow science upper limit 1000/m

The mod Factory solver based on IPMs for LP (0.3.12) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event factory_solver::on_tick (ID 0)
real number expected got nan.
stack traceback:
[C]: in function 'newindex'
__factory_solver/ui/solution_editor.lua:385: in function 'handler'
flib/gui.lua:177: in function 'dispatch'
factory_solver/fs_util.lua:138: in function 'dispatch_to_subtree'
factory_solver/control.lua:125: in function <factory_solver/control.lua:115>

Thanks for the bug report. Sorry for my late reply.

I have not been able to reproduce the bug with what you have reported. But I know the cause and will be able to fix bug in the near future. (maybe)